It sounds like this might be a fan-made artwork, story, or animation chapter featuring Tifa Lockhart (from Final Fantasy VII ) in a mansion setting, possibly by an artist or creator named Mujitax.
I notice you’ve shared a title or reference: "Tifa In The Mansion Part 1 -Mujitax-" — piece . Tifa In The Mansion Part 1 -Mujitax-